JOURNAL OF HAZARDOUS MATERIALS
·
2023
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IF 13.6
Hao Lei,Shilong Song,Ning Pan,Hao Zou,Xiaoqiang Wang,Xianguo Tuo
Achieving efficient uranium adsorption from highly acidic wastewater is still considered challenging. Here, an inorganic-organic hybridized self-assembly material (rPFE-10) with redox activity was constructed by phytic acid (PA), ethylenediamine (EDA), and Fe(II) via a facile one-pot route, and further applied for U(VI) removal. In the static adsorption experiment, rPFE-10 achieved the maximum U(VI) adsorption capacity of 717.1 mg/g at the optimal pH of 3.5. It also performed preeminently in a highly acidic condition of pH = 1.0, with the highest adsorption capacity of 551.2 mg/g and an equilibrium time of 30 min. Moreover, rPFE-10 exhibited a pH-responsive adsorption selectivity for U(VI) and An-Ln ( S (U(VI) ) and S (An-Ln) ), which increased to 69 % and 94 % respectively as pH decreased from 3.0 to 1.0. Additionally, the spectral analysis revealed a reconstruction mechanism induced by multiple synergistic adsorption, in which U(VI) exchange with EDA +/2+ and Fe 2+/3+ and earned suitable coordination geometry and ligand environment to coordinate with PA (mainly P-OH), while partial U(VI) is reduced by Fe(II) in framework. This work not only highlights the facile strategy for enhanced U(VI) retention in highly acidic solution, but expands the potential application of supramolecular self-assembly material in treatment of nuclear wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Junzhi Wang,Yun Zhang,Xinxing Peng,Wei Gong,Dezhan Ye,Jie Xu
Separator is one of the important elements of lithium-ion batteries, which affects both the capacity and safety performance of the batteries. In this paper, polypyrrole (PPy) was grown on bacterial cellulose (BC) nanofibers using in situ polymerization. A bilayered composite separator with PPy-coated BC conductive upper layer and BC insulating lower layer was prepared by paper-making method. The redox-active PPy could contribute to a specific discharge capacity of 119 mAh g −1 at 2C current density for the battery with the bilayered separator, which is significantly superior to the device with the polyolefin separator (73 mAh g −1 ). Moreover, the redox layer provided a low overpotential in the Li//Li symmetric cell cycle, which played an important role for the cycle stability of the lithium-ion batteries.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 45
·期 2
·3305-3314
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IF 3.741
Zhong Ma,Shuai Zhang,Yonggang Lu
Summary NiFe 2 O 4 presents high redox activity and good promoted application prospect in chemical looping processes. However, phase segregation caused by outward diffusion of Fe cations often lead to low cycling stability for NiFe 2 O 4 . In this study, the inherent mechanism of phase segregation for NiFe 2 O 4 was investigated deeply. The results indicated that reduction degree exhibited significant influence on the phase segregation of NiFe 2 O 4 in successive redox cycles. When NiFe 2 O 4 was reduced to Ni and Fe 3 O 4 in redox cycles, NiFe 2 O 4 displayed stable redox activity without phase segregation. As the reduction degree reached to FeO and FeNi, a needle-like structure with Fe enrichment was formed on the surface of the first cycled NiFe 2 O 4 . In the subsequent redox cycles with deep reduction degree, both severe phase segregation and deactivation were occurred for spent NiFe 2 O 4 sample. It can be seen that phase segregation is the main reason for the deactivation of NiFe 2 O 4 instead of surface sintering in redox cycles. The results of this work provide guidance for the development of NiFe 2 O 4 -based oxygen carriers with high redox performance.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Lei Wu,Ruiting Xue,Yang Li,Shaobo Cao,Jian yang,Ximei Fan
Metal/semiconductor heterostructures have been widely used to drive photochemical reactions. However, understanding of the synergies between them is still limited. In this study, we discovered that under ultraviolet (UV) light, rather than visible (Vis) excitation, the redox active sites oxidize adsorbed water and reduce oxygen molecules more efficiently. In this paper, the comprehensive mechanism of Ag@TiO 2 photocatalysis of H 2 O 2 has been elucidated and confirmed their synergies in photocatalytic reactions, through in situ characterization and theoretical calculation. Our findings provide insights into the key factors that influence the difference of photoactivity in UV and Vis light, thus having important implications for the design of solar energy conversion materials as well as environmental purification materials.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2021
·
IF 1.134
Yan-Yan LI,Yu-Xi YANG,Sha-Sha HONG,Yao LIU,Zhi YANG,Bin-Yu ZHAO,Jian-Po SU,Li WANG
A novel redox-active Schiff base polymer (SBP PPDA-PDA ) was prepared by condensation of p -phenylenediamine with 1,10-phenanthroline-2,9-dicarbaldehyde. The structure of SBP PPDA-PDA was investigated by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, N 2 adsorption/desorption isotherm, and powder X-ray diffraction and electrochemical techniques. The results showed that SBP PPDA-PDA had two-dimensional lamellar structure. The electrochemical properties of SBP PPDA-PDA were characterized by cyclic voltammetry, showing several pairs of redox peaks and good catalytic ability toward oxygen reduction. On the basis of the redox-active activity of SBP PPDA-PDA , an electrochemical pH sensor was proposed based on SBP PPDA-PDA with a linear range from 2 to 9 for pH detection. With nitrogen-containing skeleton and porous structure, SBP PPDA-PDA could be used as support to load glucose oxidase (GOD). Thus, a novel ratiometric electrochemical glucose sensor was further constructed by immobilizing GOD on SBP PPDA-PDA modified electrode. The results revealed that the reduction peak of O 2 decreased with the gradual addition of glucose, while the response peak of SBP PPDA-PDA at about 0.15 V almost remained. The sensor based on GOD/SBP PPDA-PDA /SPE showed a rapid response, a linear range from 22.5 μmol/L–5 mmol/L and a lower detection limit of 7.56 μmol/L for glucose.
研究领域:
生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Xuehong Zhang,Wei Liu,Xuemei Li,Zhen Zhang,Duoliang Shan,Hong Xia,Shouting Zhang,Xiaoquan Lu
Hexavalent chromium ion (Cr6+) is one of the most toxic substances for plants, for animals, and is a confirmed human respiratory carcinogen. However, so far, there are few independent and efficient colorimetric methods for detection of Cr6+. Here, we introduce a convenient, label-free, catalysis-based, and efficient strategy for quantification of Cr6+ by using a colorimetric sensing probe 3,3′,5,5′-tetramethylbenzidine (TMB). In the presence of a trace amount of gold amalgam nanocomposites (Au@Hg) and Cr6+, TMB can be oxidized to oxTMB and the color changed to an intense blue that was observed by naked-eye and absorption spectroscopic method. In addition, the colorimetric method shows the high selectivity against 34 other interfering substances, and it can be performed at room temperature, in water, and requires only ∼5 min. Thus, the catalysis-based colorimetric assay for accurate and ultrahigh selective identification of Cr6+ will find widespread use in the world.
研究领域:
环境科学
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分析化学
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Lizhu Liu,Tianying Wang,Hao Zhou,Jinyang Zheng,Qiang Liu,Wei Wang,Xinxin Liu,Xiuming Zhang,Dongtao Ge,Wei Shi,Yanan Sun
Parkinson's disease (PD) pathology speculates that neuromelanin (NM) and iron ions play a significant role in physiological and pathological conditions of PD. Because the difficult accessibility of NM has limited targeted research, synthetic melanin-like nanoparticles have been used to instead. In this report, the eumelanin and pheomelanin-like polydopamine (PDA) nanoparticles are prepared that can be used to simulate natural NM with or without chelating iron ion and studied the redox effects in vitro and in vivo on neuronal cells and PD. The synthetic pheomelanin-like PDA nanoparticles have much stronger redox activity than eumelanin-like PDA nanoparticles without or with iron ion. They can protect neurons by scavenging reactive oxygen species (ROS), while cause neuronal cell death and PD due to excessive binding of iron ions. This work provides new evidence for the relationship among two structural components of NM and iron in PD as well as displays the different effects on the roles of eumelanin and pheomelanin in redox activity under physiological or pathological conditions, which provide a new effective choice for cellular and animal models of PD and offer theoretical guidance for targeted treatment and mechanism research on PD.
研究领域:
神经科学
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医学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Yuhang Jia,Shaopei Yang,Fuyao Huang,Daping Hu,Runhai Wu,Chenliang Gong,Xue Wang,Yuman Dong,Pengcheng Du
As a well-known two-dimensional material, graphene is widely used as an electrode material in energy storage devices. However, the tendency of the agglomeration or restacking of graphene sheets limit the properties. To overcome this issue, redox-active molecules can be introduced that inhibit the stacking of graphene sheets and impart excellent pseudocapacitance properties. In this study, we design a three-dimensional (3D) graphene network anchored with redox-active 2,5-(di- p -phenylenediamine)-1,4-benzoquinone (DBP) and hydroquinone (HQ) (DFGN) using a facile one-step hydrothermal process. The covalent binding and absorption between redox-active molecules and graphene sheets reduce restacking and enable promising pseudocapacitance through reversible faradic reactions of quinone and aniline structures. Among all the samples, DFGN-1 shows the best specific capacitance (667.3 F/g at 1 A/g), high-rate capability (89.2 % even up to 50 A/g), and good cycling stability. Furthermore, DFGN-1 is also employed as an electrode material to construct flexible solid-state supercapacitors (FSSCs), which exhibit great specific capacitance (441 F/g at 0.5 A/g), excellent cycling stability (90.6 % after 10,000 cycles at 10 A/g) and high-energy density of 9.29 Wh/kg at a power density of 96.22 W/kg. Interestingly, FSSCs also display great mechanical flexibility in bending and twisting states and extraordinary mechanical durability even after being bent 5000 times. Overall, double redox-active quinone molecules functionalized 3D graphene network provides a novel tactic to construct promising potential electrodes in energy storage applications .
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2022
·
IF 19.069
Gabriel Sikukuu Nambafu,Ernest Pahuyo Delmo,Usman Bin Shahid,Cheng Zhang,Qing Chen,Tianshou Zhao,Ping Gao,Khalil Amine,Minhua Shao
Non-aqueous redox flow batteries based on total organic electrolytes, consisting of earth-abundant elements, i.e., C, H, N, O, are regarded as a promising technology for sustainable and large-scale energy storage. In particular, bipolar redox-active organic materials (BROMs) are distinctly fascinating as electroactive species because they have multiple oxidation states and can undergo multiple redox processes . By virtue of this unique characteristic, BROMs can be utilized as both anolyte and catholyte in symmetric flow batteries, consequently, helping alleviate cross-contamination issues. Herein we report an all-organic symmetric redox flow battery based on diimide molecule as a bipolar electroactive material. The potential interval between the cathodic peak and the inner and outer anodic peaks led to a promising cell voltage of 2.22 V. The symmetric battery can be operated at a current density of 20 mA cm −2 , with a coulombic efficiency of 90% for over 100 cycles. This work proposes an alternative approach to designing multi-electron organic redox active materials to facilitate the advancement of high-density symmetric flow batteries.
研究领域:
能源科学
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电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2025
·
IF 6.3
Yifan Cui,Xiaoyan Zhang,Peijie Yang,Yanwei Liu,Maoyong Song,Yingying Guo,Wentao Jiao,Yongguang Yin,Yong Cai,Guibin Jiang
Fe reducing bacteria (FRB), through extracellular electron transfer (EET) pathway, can reduce Fe(III) nanoparticles, thereby affecting the migration, transformation, and degradation of pollutants. However, the interaction of Fe(III) nanoparticles with the most commonly identified FRB, Geobacter sulfurreducens PCA, remains poorly understood. Herein, we demonstrated that the synergistic role of outer membrane proteins and periplasmic proteins in the EET process for α-Fe 2 O 3 , Fe 3 O 4 , and β -FeOOH nanoparticles by construction of multiple gene knockout strain. oxpG (involved in the type II secretion system) and omcST (outer membrane c-type cytochrome) mediated pathways accounted for approximately 67 % of the total reduction of α-Fe 2 O 3 nanoparticles. The residual reduction of α-Fe 2 O 3 nanoparticles in ∆ oxpG - omcST strain was likely caused by redox-active substances in cell supernatant. Conversely, the reduction of dissolved Fe(III) was almost unaffected in ∆ oxpG - omcST strain at the same concentration. However, at high dissolved Fe(III) concentration, the reduction significantly decreased due to the formation of Fe(III) nanoparticles, suggesting that this EET process is specific to Fe(III) nanoparticles. Overall, our study provided a more comprehensive understanding for the EET pathways between G. sulfurreducens PCA and different Fe(III) species, enriching our knowledge on the role of microorganisms in iron biogeochemical cycles and remediation strategies of pollutants.
研究领域:
微生物学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Daping Hu,Yuhang Jia,Shaopei Yang,Fuyao Huang,Yuman Dong,Pengcheng Du
Porous organic polymers (POPs) have been received considerable attention due to their advantages of large surface areas, good stability and functionalities, which are considered an ideal electrode material for the energy storage device that has been developed and applied in lithium batteries, zinc ion batteries and supercapacitors. Here we describe the synthesis of four kinds of redox-active 2D POPs via solvothermal Schiff base condensation using aniline oligomers with different chain lengths as building units that exhibit reversible electrochemical processes. Among them, the Tp-AT-POP based on 1,3,5-triformylphloroglucinol (Tp) and aniline trimer (AT) deliver high electrochemical performance mainly contributed by redox units exhibiting high specific capacitance up to 348.3 F/g at a current density of 0.5 A/g and possessing excellent cycling stability of 71% after 5000 cycles. In addition, the Tp-AT-POP is developed to assemble a symmetric supercapacitor with specific capacitances of 167 F/g at 0.3 A/g and good cycling stability. This work provides an efficient strategy for developing the redox-active 2D POPs with aniline oligomer structure for the next-generation advanced high-performance energy storage device.
研究领域:
材料科学
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能源存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 79
·75896-75904
·
IF 3.289
Enke Feng,Guofu Ma,Kanjun Sun,Qian Yang,Hui Peng,Ziqiang Lei
Gel electrolytes with a reasonable ionic conductivity and high mechanical strength have drawn great interest for applications in flexible and wearable devices. However, the demand for gel electrolytes that combine high mechanical strength and excellent electrochemical performances remains a challenge. Here, a novel redox-active gel electrolyte was prepared by adding AQQS (1-anthraquinone sulfonic acid sodium) to a PVA (polyvinyl alcohol)–H2SO4 system using a simple solution-mixing/casting method, which possesses not only excellent mechanical strength but also a high ionic conductivity of 28.5 mS cm−1. Surprisingly, the as-fabricated supercapacitor can be operated at a wide voltage range of 0–1.4 V, which is much larger than that of the previously reported active electrolyte based supercapacitors (about 1.0 V). Furthermore, the supercapacitor exhibits superior electrochemical performance such as a maximum specific capacitance of 448 F g−1 at a current density of 0.5 A g−1, a high specific energy of 30.5 W h kg−1 at a specific power of 350 W kg−1 and good cycling stability with 91% specific capacitance retention after 1000 cycles. Additionally, such a device displays remarkably stable capacitive performance with the gel electrolyte even under a large tensile strain of 100%, a high pressure of 2000 kPa or fold states. The results doubtlessly demonstrate that the toughened redox-active gel polymer is a promising electrolyte candidate for developing high energy density flexible energy storage devices.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）